An instrument that measures the humidity or moisture content of air, essential for weather monitoring and understanding atmospheric conditions. Hygrometers help predict precipitation, fog formation, and other weather phenomena related to water vapor.
From Greek 'hygros' meaning 'wet' or 'moist' and 'metron' meaning 'measure.' The first hygrometer was invented in 1480 by Leonardo da Vinci, with various improvements made over the centuries to increase accuracy.
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